In Japan, cranes are seen as mystical creatures, symbols of luck and longevity. They have a fabled life span of 1000 years, and for this reason it is said that anyone who folds 1000 origami cranes will be granted a wish by the gods. A gift of 1000 cranes may be given to someone ill or in hospital, or they can be seen at war memorials as a symbol of peace.

These cranes look like origami, but also like they could have been formed in stained glass. You can't fold glass, so which is it?